US7692612B2 - Video enhancement and display power management - Google Patents
Video enhancement and display power management Download PDFInfo
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- US7692612B2 US7692612B2 US11/471,356 US47135606A US7692612B2 US 7692612 B2 US7692612 B2 US 7692612B2 US 47135606 A US47135606 A US 47135606A US 7692612 B2 US7692612 B2 US 7692612B2
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/14—Digital output to display device ; Cooperation and interconnection of the display device with other functional units
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/3406—Control of illumination source
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
- G09G3/3611—Control of matrices with row and column drivers
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0271—Adjustment of the gradation levels within the range of the gradation scale, e.g. by redistribution or clipping
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/06—Adjustment of display parameters
- G09G2320/0606—Manual adjustment
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/06—Adjustment of display parameters
- G09G2320/0626—Adjustment of display parameters for control of overall brightness
- G09G2320/0646—Modulation of illumination source brightness and image signal correlated to each other
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/06—Adjustment of display parameters
- G09G2320/0626—Adjustment of display parameters for control of overall brightness
- G09G2320/0653—Controlling or limiting the speed of brightness adjustment of the illumination source
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
- G09G2330/02—Details of power systems and of start or stop of display operation
- G09G2330/021—Power management, e.g. power saving
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2340/00—Aspects of display data processing
- G09G2340/16—Determination of a pixel data signal depending on the signal applied in the previous frame
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2360/00—Aspects of the architecture of display systems
- G09G2360/14—Detecting light within display terminals, e.g. using a single or a plurality of photosensors
- G09G2360/144—Detecting light within display terminals, e.g. using a single or a plurality of photosensors the light being ambient light
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2360/00—Aspects of the architecture of display systems
- G09G2360/16—Calculation or use of calculated indices related to luminance levels in display data
Abstract
Description
m≦smax,
m≧smin, (1)
where smax and smin are determined from a target backlight scaling factor, u/255. Then
s max=255/u
s min =s×255/u
where s is a suitably chosen parameter.
If s(i)>s max, then s(i)=s max
If s(i)<s min, then s(i)=s min
y f=min (255, x f×255/u)
where xf is the maximum input luminance for the frame.
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- 8. By scaling of chrominance pixels, apply a color boost to the chrominance values for improving the color combination of the processed image. For example, in a preferred embodiment in the YUV space, the U and V components each are scaled up by a respective fixed factor. Alternatively, chrominance scaling can involve a generic functional transform of the luminance component.
Claims (30)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US11/471,356 US7692612B2 (en) | 2006-02-08 | 2006-06-20 | Video enhancement and display power management |
US11/496,191 US7873229B2 (en) | 2006-02-08 | 2006-07-31 | Distributed processing for video enhancement and display power management |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US77152406P | 2006-02-08 | 2006-02-08 | |
US11/471,356 US7692612B2 (en) | 2006-02-08 | 2006-06-20 | Video enhancement and display power management |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/496,191 Continuation-In-Part US7873229B2 (en) | 2006-02-08 | 2006-07-31 | Distributed processing for video enhancement and display power management |
Publications (2)
Publication Number | Publication Date |
---|---|
US20070182757A1 US20070182757A1 (en) | 2007-08-09 |
US7692612B2 true US7692612B2 (en) | 2010-04-06 |
Family
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Application Number | Title | Priority Date | Filing Date |
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US11/471,356 Expired - Fee Related US7692612B2 (en) | 2006-02-08 | 2006-06-20 | Video enhancement and display power management |
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US (1) | US7692612B2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20080136844A1 (en) * | 2006-11-21 | 2008-06-12 | Naoki Takada | Display driver |
US20080238935A1 (en) * | 2007-03-30 | 2008-10-02 | Novatek Microelectronics Corp. | Contrast control apparatus and contrast control method and image display |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20080174607A1 (en) * | 2007-01-24 | 2008-07-24 | Ali Iranli | Systems and methods for reducing power consumption in a device through a content adaptive display |
KR101854432B1 (en) * | 2011-06-23 | 2018-05-03 | 삼성전자주식회사 | Method and apparatus for detecting and compensating back light frame |
US10165218B2 (en) * | 2013-07-24 | 2018-12-25 | Samsung Electronics Co., Ltd. | Display power reduction using histogram metadata |
KR102246307B1 (en) * | 2014-12-02 | 2021-04-30 | 삼성디스플레이 주식회사 | Method of controlling scale factor and method of controlling luminance including the same |
Citations (10)
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US5170443A (en) * | 1990-03-07 | 1992-12-08 | International Business Machines Corporation | Image processor for processing source pixel intensity values |
US5226175A (en) * | 1989-07-21 | 1993-07-06 | Graphic Edge, Inc. | Technique for representing sampled images |
US5854851A (en) * | 1993-08-13 | 1998-12-29 | Sophis View Technologies Ltd. | System and method for diagnosis of living tissue diseases using digital image processing |
US6535191B1 (en) * | 1999-03-29 | 2003-03-18 | Sharp Kabushiki Kaisha | Liquid crystal display device |
US20060119612A1 (en) * | 2004-12-02 | 2006-06-08 | Kerofsky Louis J | Methods and systems for image-specific tone scale adjustment and light-source control |
US20060209005A1 (en) * | 2005-03-02 | 2006-09-21 | Massoud Pedram | Dynamic backlight scaling for power minimization in a backlit TFT-LCD |
US7176878B2 (en) * | 2002-12-11 | 2007-02-13 | Nvidia Corporation | Backlight dimming and LCD amplitude boost |
US7348991B1 (en) * | 2003-04-16 | 2008-03-25 | Silicon Image, Inc. | Video/graphics text mode enhancement method for digitally processed data |
US7424148B2 (en) * | 2003-06-27 | 2008-09-09 | Stmicroelectronics Asia Pacific Pte. Ltd. | Method and system for contrast enhancement of digital video |
US7460103B2 (en) * | 2004-02-09 | 2008-12-02 | Hitachi Displays, Ltd. | Liquid crystal display apparatus with luminance distribution calculating, backlight controller, and video correction to improve display contrast ratio |
-
2006
- 2006-06-20 US US11/471,356 patent/US7692612B2/en not_active Expired - Fee Related
Patent Citations (10)
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US5226175A (en) * | 1989-07-21 | 1993-07-06 | Graphic Edge, Inc. | Technique for representing sampled images |
US5170443A (en) * | 1990-03-07 | 1992-12-08 | International Business Machines Corporation | Image processor for processing source pixel intensity values |
US5854851A (en) * | 1993-08-13 | 1998-12-29 | Sophis View Technologies Ltd. | System and method for diagnosis of living tissue diseases using digital image processing |
US6535191B1 (en) * | 1999-03-29 | 2003-03-18 | Sharp Kabushiki Kaisha | Liquid crystal display device |
US7176878B2 (en) * | 2002-12-11 | 2007-02-13 | Nvidia Corporation | Backlight dimming and LCD amplitude boost |
US7348991B1 (en) * | 2003-04-16 | 2008-03-25 | Silicon Image, Inc. | Video/graphics text mode enhancement method for digitally processed data |
US7424148B2 (en) * | 2003-06-27 | 2008-09-09 | Stmicroelectronics Asia Pacific Pte. Ltd. | Method and system for contrast enhancement of digital video |
US7460103B2 (en) * | 2004-02-09 | 2008-12-02 | Hitachi Displays, Ltd. | Liquid crystal display apparatus with luminance distribution calculating, backlight controller, and video correction to improve display contrast ratio |
US20060119612A1 (en) * | 2004-12-02 | 2006-06-08 | Kerofsky Louis J | Methods and systems for image-specific tone scale adjustment and light-source control |
US20060209005A1 (en) * | 2005-03-02 | 2006-09-21 | Massoud Pedram | Dynamic backlight scaling for power minimization in a backlit TFT-LCD |
Non-Patent Citations (3)
Title |
---|
Ali Iranli et al., , "HEBS: Histogram Equalization for Backlight Scaling", Proceedings of the Design, Automation and Test in Europe Conference and Exhibition, 2005. |
Liang Cheng et al., "Quality Adapted Backlight Scaling (QABS) . . . ", Proc. of the 4th International Conference on Networking, Reunion Island, France, Apr. 17-21, 2005. |
Wei-Chung Cheng et al., "Power Minimization in a Backlit TFT-LCD Display . . . ", Proc. of the Design, Automation and Test in Europe Conf. and Exhibition, vol. 1, 2004. |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20080136844A1 (en) * | 2006-11-21 | 2008-06-12 | Naoki Takada | Display driver |
US8754841B2 (en) | 2006-11-21 | 2014-06-17 | Renesas Electronics Corporation | Display driver |
US20140247291A1 (en) * | 2006-11-21 | 2014-09-04 | Renesas Electronics Corporation | Display driver |
US9626916B2 (en) * | 2006-11-21 | 2017-04-18 | Synaptics Japan Gk | Display driver |
US20080238935A1 (en) * | 2007-03-30 | 2008-10-02 | Novatek Microelectronics Corp. | Contrast control apparatus and contrast control method and image display |
US8237688B2 (en) * | 2007-03-30 | 2012-08-07 | Novatek Microelectronics Corp. | Contrast control apparatus and contrast control method and image display |
Also Published As
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US20070182757A1 (en) | 2007-08-09 |
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